Though this red pen is very precise in both writing with a needle point, and
erasing with the thin cone of frixion rubber; the red ink is too faint for me. A
teacher could not use this for grading, because the red is on the light side.
Also, the needle point does seem to get clogged sometimes, and not write with a
smooth stream. So I personally recommend the frixion nock retractable pens
instead.